Control device for fluid pressure and flow direction

ABSTRACT

A control device for fluid pressure and flow direction includes a fan and a frame member. The fan has an inlet and an outlet and the frame member provides at least a first opening and a second opening at two lateral sides thereof. A middle solid part is disposed in the frame member extending to the second opening from the first opening in a way of gradual convergence. A flow passage is formed between the middle solid part and the frame member with an end thereof at the second opening side being greater than the other end at the first opening side. Therefore, the fluid is controlled to increase or decrease the pressure thereof, decrease noise and flow direction.

BACKGROUND OF THE INVENTION

1. Field of the Invention:

The present invention is related to a control device for fluid pressureand flow direction and particularly to a control device joined to theinlet and the outlet of the fan.

2. Brief Description of the Related Art:

Due to electronic parts being updated continuously, speed, performanceand power are promoted along with problem of heat generation.

Usually, high power electronic parts are high heat generator such ashigh speed central processing unit. If heat is unable to be removed fromthe heat generation parts, the performance is degraded tremendously toaffect life span of the parts. In order to allow the high powerelectronic parts executing the original performance thereof andincreasing life span thereof, problem of heat dissipation of the partsgenerally is investigated.

Further, referring to FIG. 1, a conventional fan includes a fan frame 11and a fan wheel 12 attached in side the fan frame 11. The fan frame 11has an inlet 111 and an outlet 112 at two lateral sides thereofrespectively with a hub seat 113. The fan wheel 12 includes a hub 121and a plurality of fan blades 122 extending radially from the hub 121.The fan wheel 12 is rotationally joined to the hub seat 113. When thefan wheel 12 rotates, the fan blades 122 induce fluid to enter the fanframe via the inlet 111 and flow outward via the outlet 112.

However, the preceding fan creates a problem that the fluid consumesduring moving and the fluid pressure is unable to increase such that itis incapable of providing effect of heat dissipation.

SUMMARY OF THE INVENTION

In order to solve the preceding problems, an object of the presentinvention is to provide a control device for fluid pressure and flowdirection with which the fluid pressure can be increased or decreasedunder control.

BRIEF DESCRIPTION OF THE DRAWINGS

The detail structure, the applied principle, the function and theeffectiveness of the present invention can be more fully understood withreference to the following description and accompanying drawings, inwhich:

FIG. 1 is a sectional view of a conventional fan;

FIG. 2 is an exploded perspective view of the first embodiment of acontrol device for fluid pressure and flow direction according to thepresent invention;

FIG. 3 is another exploded perspective view of the first embodiment of acontrol device for fluid pressure and flow direction according to thepresent invention;

FIG. 4 is an assembled perspective view of the first embodiment of acontrol device for fluid pressure and flow direction according to thepresent invention;

FIG. 5 is a sectional view of the first embodiment of a control devicefor fluid pressure and flow direction according to the presentinvention;

FIG. 6 is another sectional view of the first embodiment of a controldevice for fluid pressure and flow direction according to the presentinvention;

FIG. 7 is a further sectional view of the first embodiment of a controldevice for fluid pressure and flow direction according to presentinvention;

FIG. 8 is a further sectional view of the first embodiment of a controldevice for fluid pressure and flow direction according to the presentinvention;

FIG. 9A is a sectional view illustrating another configuration of themiddle receiving part in the first embodiment of a control device forfluid pressure and flow direction according to the present invention;

FIG. 9B is a sectional view illustrating a further configuration of themiddle receiving part in the first embodiment of a control device forfluid pressure and flow direction according to the present invention;

FIG. 9C is a sectional view illustrating a further configuration of themiddle receiving part in the first embodiment of a control device forfluid pressure and flow direction according to the present invention;and

FIG. 10 is a sectional view of the second embodiment of a control devicefor fluid pressure and flow direction according to the presentinvention.

DETAILED DESCRIPTION OF THE INVENTION

Referring to FIGS. 2 to 5, the first preferred embodiment of a controldevice for fluid pressure and flow direction according to the presentinvention includes a fan 21 and a frame member 22. The fan 21 furtherincludes a fan frame 211 and a fan wheel 212. The fan frame 211 has aninlet 2111 and an outlet 2112 at two opposite lateral sides thereofrespectively and the fan wheel 212 is rotationally joined to a fan wheelseat 2113 disposed near the outlet 2112.

The frame member 22 has at least a first opening 221 at a lateral sidethereof and at least a second opening 222 at another lateral sidethereof. A middle solid part 223 is arranged in the frame member 22 toextend to the second opening 222 in an convergent way from the firstopening 221 such that a flow passage 224 is formed between the middlesolid part 223 and the frame member 22 extending toward the secondopening 222 from the first opening 221 along with a dimension thereofgetting larger. Further, the second opening 222 is arranged tocorresponding to and be joined to the side of the inlet 2111.

When the fan wheel 212 is actuated to run, the fluid is induced to enterthe flow passage 224 via the first opening 221 and the second opening222 to the inlet 2111 of the fan 21 and then moves outward via theoutlet 2112. Flow speed of the fluid becomes slower gradually due to thedimension of the flow passage 224 getting larger and fluid pressure isincreasing while moving out of the outlet 2112. Further, fluid pressureincreasing results in greater resistance of fan 21 and heat dissipationis enhanced substantially.

Referring to FIG. 6, the first opening 221 of the frame member 22 can bejoined to the fan 21 at the outlet 2112 side such that the fluidpressure is controlled to increase for promoting heat dissipationefficiency and to gather toward the center thereof for decreasingstagnation zone at the back of the middle solid part 223 during movingoutward the second opening 222.

Referring to FIG. 7, the first opening 221 of the frame member 22 can bejoined to the fan 21 at the inlet 2111 side such that the fluid providesfaster flow speed and decreasing fluid pressure during passing the flowpassage 224 and the fluid pressure reduces to decrease noise while thefluid moves outward via the outlet 2112.

Referring to FIG. 8, the second opening 222 of the frame member 22 canbe joined to the fan 21 at the outlet 2112 side such that the fluid iscontrolled to reduce pressure thereof for decreasing noise and to flowtoward the center of the first opening 221 so as to spread outward andexpand heat dissipation area.

The middle solid part 223 is provided with different shapes shown inFIGS. 9A, 9B and 9C. FIG. 9A shows the middle solid part 223 a has ashape converging gradually from the first opening 221 to the secondopening 222 with a cross section of hexagon shape. FIG. 9B shows themiddle solid part 223 b extends outward the first opening 221 at an endthereof. FIG. 9C shows the middle part 223 c pressing against the firstopening 221. The preceding three different shapes of middle solid parts223 a, 223 b and 223 c are capable of controlling changes of the fluidpressure, reducing noise and flow direction.

Referring to FIG. 10, the second embodiment of a control device forfluid pressure and flow direction according to the present invention isillustrated. The present embodiment is similar to the preceding firstembodiment. It is noted that identical parts are designated with thesame references and no detail will be described further. The differenceof the present embodiment from the first embodiment is in that at leasta static wing 225 connecting with the inner wall of the frame member 22and the middle solid part 223 such that the static wing 225 is disposedin the flow passage 224 is capable of increasing fluid pressure forenhancing heat dissipation efficiency, reducing noise and controllingflow direction.

While the invention has been described with referencing to preferredembodiments thereof, it is to be understood that modifications orvariations may be easily made without departing from the spirit of thisinvention, which is defined by the appended claims.

1. A control device for fluid pressure and flow direction, comprising: afan, providing an inlet and an outlet; and a frame member, providing atleast a first opening at one lateral side thereof and a second openingat another side thereof and having a middle solid part therein extendingto the second opening from the first opening in a way of gradualconvergence; wherein, a flow passage is formed between the middle solidpart and the frame member and the flow passage at the second openingside is greater than that at the first opening.
 2. The control devicefor fluid pressure and flow direction as defined in claim 1, wherein thesecond opening is connected to the inlet side of the fan.
 3. The controldevice for fluid pressure and flow direction as defined in claim 1,wherein the first opening is connected to the outlet side of the fan. 4.The control device for fluid pressure and flow direction as defined inclaim 1, wherein the first opening is connected to the inlet side offan.
 5. The control device for fluid pressure and flow direction asdefined in claim 1, wherein the second opening is connected to theoutlet side of the fan.
 6. The control device for fluid pressure andflow direction as defined in claim 1, wherein at least a static wing isjoined to the inner wall of the frame member and the middle solid part.